Granted Patent
Utility
US 5,120,696 · App. 07/634,696
Olefin polymerization catalyst and process for the polymerization of olefins
Inventors:
Toshiyuki Tsutsui, Takashi Ueda
Patented Case
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Granted: Jun 9, 1992
Filed: Dec 27, 1990
Inventors
Toshiyuki Tsutsui
Takashi Ueda
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.